3. Spray a large nonstick skillet with olive oil cooking spray. Over medium heat, cook patties 6 to 7 minutes per side until cooked through, or 165°F at the center. Meanwhile, sprinkle zucchini slices with salt and pepper to taste. Place in the same skillet and cook on both sides, 5 minutes or until browned. Remove zucchini and toast buns in pan for 1 to 2 minutes.

4. Spread 1 Tbsp of the yogurt mixture on the bottom half of each bun, and, if you want, add lettuce, tomato, and a red onion slice. Put burger and zucchini slices on top. Spread remaining yogurt mixture on top halves of buns. Side idea: Serve with sweet potato fries.